Burr-remover



(No Model.)

W. M. WOOD;

BURR REMOVBR.

No. 440,682. Patented Nov. 18, 1890.

ATTEST'" l/vvE/v'roaf Q 4 aw. 7'M I UNITED STATES PATENT OFFICE.

WILLIAM MAXWELL WOOD, OF BOSTON, MASSAOHUSETT S, ASSIGNOR TO THE THOMSONELECTRIC WELDING COMPANY, OF MAINE.

BURR-REMOVER.

SPECIFICATION forming part of Letters Patent No. 440,682, dated November18, 1890.

Application filed April 19, 1890. Serial No. 348,676. (No model.)

To aZZ whom it may concern.-

Be it known that I, WILLIAM MAXWELL WOOD, a citizen of the UnitedStates, and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented a certain new and useful Burr-Remover, ofwhich the following is a specification.

My invention relates to the construction of emery-wheels or wheels madeof other similar abrasive or polishing material and designed for use inremoving protuberances or projections from metal or other objects, so asto produce a uniformly smooth or plane surface.

My invention is especially designed for wheels used in removing the burrformed at the weld made by the well-known electric- Welding process.

My invention consists, essentially, in providing the wheel with twoguards of nonabrasive material consisting of disks or plates applied toopposite sides of the wheel and coming out flush at their edges with thegrinding-surface of such wheel. These guards being thus constructed areadapted to engage with the material in its plain or fiat portions at thesides of the projections to be reduced, and to thereby prevent thereduction or lowering of the general plane by the grinding or cutting,while at the same time permitting the wheel itself to operate freely andabrade or grind the parts arising above such plane.

I have herein illustrated my invention as embodied in a toolparticularly adapted to removing the burr from pieces of metal joined bythe electric-welding process,'wherein end pressure is employechso as tocause the metal to upset at the joint.

In the accompanying drawings, Figure 1 is a side elevation of a wheelembodying my invention. Fig. 2 illustrates a modification wherein twowheels of different degrees of fineness are combined in one structure.Figs. 3 and 4 illustrate the two positions of the tool shown in Fig. 2.

Referring to Fig. 1, A indicates the body of the wheel, which is made ofemery or similar abrasive or grinding substance, and is mounted upon asuitable shaft, which passes through a suitable housing or tubing 0, bywhich the wheel may be held in the hand, motion being communicated tosuch shaft through a flexible connection or shaft. The portion of thewheel A may be wholly of emery, or may simply be faced with the emery toa suitable depth.

B 13 indicate the metal guards, which are designed to prevent the part Aof the wheel from cutting or grinding below the general plane of theobject operated upon. These guards B B are of some non-abrasivematerial, and are selected, preferably, with reference to the wear ofthe wheel A in practical operation. In practice I find that for removingthe burrs or projections from iron a metal like cast brass will do verywell for the guards B B, as it will wear at about the same rate as theemery. Of course the material for the guards would vary in any case withthe natural rate of wear of the grinding-wheel A When used in anyparticular kind of work.

In case the soft-metal guards and the wheel A wear at all unevenly afile, steel-point, or edge maybe used for truing up. As the edge is ofsoft metal, it may be readily and quickly trued by holding a fileagainst it while it is rapidly revolved.

In Fig. 2 I have shown a wheel as made of two parts A A each of anabrasive or grinding substance, but of different degrees of fineness.The guards B B B are applied, as shown, and the two parts of thecompound wheel are beveled away from the center, as indicated, so as topermit it to be used in the manner indicated in Figs. 3 and 4, thecoarse wheel being used for taking off the greater partof the burr orprojection and the burr being afterward finished with the finer wheel,as indicated in Fig. 3. The guards may be secured to the wheel in anydesired way, as by bolts passing through or by clamping the wheels andthe guards together on the shaft.

What I claim as my invention is 1. The combination, with agrinding-wheel of emery or other abrasive material, of two guard-platesor disks arranged at opposite sides of the said wheel and having theiredges flush with the grinding-surface of the wheel, as and for thepurpose described.

2. The combination, with an emery-wheel, of two metal guards composed ofmaterial adapted to wear at about the same rate as the grinding portionof the wheel and consisting applied to opposite sides of the wheel flush1 with the edge thereof; and an intermediate guard-plate between the twoparts of the wheel and flush with the greater circumference of the same,as and for the purpose described.

Signed at Boston, in the county of Suffolk and State of Massachusetts,this 16th day of April, A. D. 1890.

WVILLIAM MAXWELL WOOD.

Witnesses:

H. PERCY MAXIM, HENRY N. SWEET.

